Any sage advice on whether to replace the other tires or how
to rotate them at this point?

Background:
1991 Civic, 179k miles. One of my (then) front tires
displayed inboard wear about 7500 miles ago. Back then I
rotated it to the rear, did some suspension work, and think
I found the main cause of the wear (severely worn stabilizer
link and associated bushings). So the wear is not continuing
(knock on wood).

Yesterday I rotated the worn tire back, from rear to front.
Subsequently I noticed steering wander towards the wear side
of the tire. I switched my two front tires, and sure enough,
the wander switched.

Two of my other tires have 30k miles on them. The third has
5k miles on it (got a serious flat a few months ago). None
of these three tires are so showing irregular wear; just
what looks usual for 30k miles, and certainly not down to
the wear bars.

I am going to buy at least one new tire this week and change
out the badly worn one. The tires are Wal-Mart Viva 2, size
as recommended by Honda. Very inexpensive, consistent with
my expectation that the car may not last more than five
years more.

I certainly do not plan on losing any sleep over this. My
Civic drives great otherwise, averaging around 42 mpg for
the last five fillups. Little oily down below, but not
enough to cause garage floor spotting.

I have been holding off on the alignment (mentioned some
weeks ago) because of this, for good or bad.